Mitch previously served time in a juvenile facility for the murder of three-year-old neighbor Tommy Leggatt, which occurred when he was ten and living under the name Eric Wayne Proctor. As an adult, he also became a suspect in the kidnapping, rape, and felony murder of fifteen-year-old Chloe Dutton.

Mitch was brought to justice after the mother of his first victim and his own mother testified against him once she realized the truth about him.

Mitch was tried and convicted of Chloe's murder, later being sentenced to death. Prior to his execution, he was also a suspect in the disappearance of Emily Owens, the elderly owner of the brownstone he lived in before his arrest, but he had no knowledge of Owens' whereabouts. Her status, or whether or not Mitch was responsible for her disappearance, is currently unknown. (SVU: "Soulless")